Ukraine has banned all Russian planes from using its airspace after Russian state-controlled energy giant Gazprom said it had halted gas deliveries to its neighbour.
BBC: Ukraine closes airspace to all Russian planes
A picture taken on October 25, 2015 shows the Russian Airbus A321 plane of Kogalymavia (Metrojet) hull No EI-ETJ landing at Moscow's Domodedovo airport.
